### Entropy Equations

Posted:

**Mon Feb 11, 2019 8:03 pm**In what circumstances will we use equations with the Boltzmann equation versus nrtln(v2/v1) or nrtln(t2/t1)?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=131&t=41981

Page **1** of **1**

Posted: **Mon Feb 11, 2019 8:03 pm**

In what circumstances will we use equations with the Boltzmann equation versus nrtln(v2/v1) or nrtln(t2/t1)?

Posted: **Tue Feb 12, 2019 12:19 am**

I believe boltzmann equation will be used when dealing with microstates. The other equation is used when calculating change in entropy within a volume change in the system: delta S = n R ln(v2 / v1)

Posted: **Tue Feb 12, 2019 9:42 am**

Also generally when you use the boltzmann equation it will ask you for either residual or positional entropy rather than just entropy.